NIOSH Information Circular - 9496

Map places, people, and relationships inside a building with open source software.

"Meld buildings' directories and maps of their interiors to create
ad-hoc maps of people, meeting spaces, and other assets.

Google and MapQuest do a great job of creating maps of the outside
world on the fly. But what about our workspaces? This article
shows how to define and map places and people inside a building [or
Coal Mine?]. Search, track, and plot individual cubicles, rooms,
employees, or assets. Graph the location of individuals or groups of
employees based on job function, or track unused office space
visually."